Automatic phonograph



J. A. BoYAJlAN AUTOMATIC PHoNoGRAPH Nov. 6, 1945.

3, 1939 15 Sheets-Sheet 1 Filed Marc *+2 I [Weiz/221? Nov. 6, 1945.

J.- A. BOYAJIAN .AUTOMATIC PHONOGRAPH Filed March 5, 1939 13 Sheets-Sheet 2 Nov. 6, 1945. .1. A. BoYAJlAN AUTOMATIC PHONOGRAPH Filed March 3. 1959 13 Sheets-Sheet 3 G O E O EOOCOZOOEQ: G

Nov.' 6, 1945. J. A. BoYAJlAN AUTOMATIC PHONOGRAPH 13 Sheets-Sheet 4 Filed March 3, 1959 X25/deja Nov. 6, 1945. A BQYAJMN 2,388,595

AUTOMATIC PHONOGRAPH Filed March 3, 1939 15 Sheets-Sheet 5 1425 Y Z22/#6102??? /zQg Zava @Anja/1y, Ze@ JVM/e@ Nov. 6, 1945. J. A. BoYAJlAN AUTOMATIC PHONOGRAPH Filed March 5, 1939 l5 Sheets-Sheet 6 Nov. 6, 1945. J. A.I BoYAJlAN AUTOMATIC PHONOG'RAPH l Filed March 3, 1939 15 sheejs-snet 7 llll Nov.V 6, 1945. J. A. BoYAJlAN 2,388,595

AUTOMATIC PHONOGRAPH' Filed March 3, 1939 13 Sheets-Sheet 8 Nov.- 6, 1945. J. A. BoYAJlAN AUTOMATIC PHONOGRAPH Filed March 5, 1959 13 Sheets-Sheet 9 N0V- .6, 1945- J. A.'BoYA.||AN 2,388,595

AUTOMATIC PHONOGRAPH Filed March 3, 1939 13 Sheets-Sheet 10 Nov. 6, 1945. 1 A, BOYAJlAN 2,388,595

AUTOMATIC PHONOGRAPH Filed March 5, 19:59 15 sheets-sheet 11 KZgj Nov. 6, 1945. J. A. BoYAJlAN AUTOMATIC PHONOGRAPH Filed March 3,'1939 13 Sheets-Sheet 12 www:

sufra Y JMA?) 1s sheets-shed 13 151cv. 6; 1945. J. A. BoYAJlAN AUTOMATIC PHoNoGRAPH Filed March 3, 1959 LTI Patented Nov. 6, 1945 l AUTOMATIC PHONOGRAPH James A. Boyaiian, Chicago. Ill.. animcr to J. P. Seeburg Corporation, a corporation of Illinois Application March 3, 1939, Serial No. 259,586

28 Claims.

and which are provided with selector means` whereby any particular selections to be played can bepredetermined by the operator.

, The invention more particularly relates to remote control means and means adjacent a phonograph whereby such a phonograph may be put into operation by the insertion of coins and the records to be played may be selected at a location or locations remoteirom the phonograph.

One of the obiectsof the invention is-to provide an improved phonograph comprising elements at a remote position for transmitting a controllable number of impulses of high frequency energy and means adjacentV the phonograph for receiving said impulses and selecting a desired recording to be played.

A -further object oi.' the invention is to-provide an improved phonograph including a main unit and a remote unit connected together by power lines and adapted to transmit signals over the power lines for the selection of a desired recording or recordings to be played.

A further object of the invention is to provide anl automatic phonograph including a. main vunit and a remote' control unit having cooperative selector mechanism in both units. said elements in the remote unit being adapted to transmitimpulses. of radio frequency corresponding to arecording to be played and said elements in the main unit being adapted to receive said impulses and to control the" playing of the recording sel lected. l l

A'further object of the invention is to provide an automatic phonograph including a remote. f control unit and a main unit and selector means in both units adapted to cooperate by high Irequency signals whereby recordingsto be played may be selected at the remote control unit and credit may be transferred from the remote unit to the mainunit by means of high frequency impulses. n

A further object of theinvention is to provide an improvedv automatic phonograph including a main unit and a remote control unit, which are adapted to be installed in a building and operatively connected through the power wires in the building.

"Other objects, advantages'and capabilities of the invention will appear from the following description of a preferred embodiment thereof.

For simplicity of description, the present. invention is described in connection with a phonograph of the type described and claimed in application Serial No. 161,906, iiled September 1, 1937, by Carl G. Freborg. It will, however, be understood that the invention may be used with other known types of multi-selecting automatic phonographs.

-The invention will readily be understood from the following description of a preferredembodiment thereof, taken in conjunction with the accompanying drawings, in which:

Figure 1 is an elevational view, the front wall being broken away, of a remote control unit embodying my invention; t..

Fig. 2 is a sectional elevational view thereof, the section being taken on the line 2--2 of Fig. 1;

Fig. 3 is a. sectional elevational view of the re- -mote controlv unit looking towards the front of the unit, the section being taken on the line 3-3 of Fig. 2;

Fig. 4 is a sectional plan view, the section being taken on the broken line 4 4 of Fig. 2;

Fig. 5 is a sectional detail plan view, the section being taken on the line 5-.5 of Fig. 1;

Fig. 6 is a sectional detail .view of part of the selector mechanism, the section being `tal-:en on 'the line 6-6 of Fig. 4;

takenon the line 9--9v of Fig. 5;

Fig. 10 is a sectional detail view, taken on the line Ill-l0 of Fig. 1, showing the accumulator switch; v

Fig. 11 is a front elevational view of a phonograph embodying my invention, the housing of the phonograph being removed to disclose details of the machine and certain parts of the. machine being shown in section; f i

Fig. 12 is a fragmentary sectional view through thek phonograph, the section being takenon the line l2--l2 of Fig. 1-1; p

Fig. 13 is a similar view, the section being taken on the line l3l3` of Fig. 1l, and one of the.

selector elements being shown in a selecting position; i

Fig. 14 is a sectional detail view showing thestepping switch which is located at the phonograph, and associated relays in plan, the. section beingtakenon the line M-Il of Fig. 15;

Fig. is a sectional detail view, taken on the line IB-ii of Fig. 14;

Fig. 16 is a sectional detail view, taken on the line iO-IG of Fig. 14;

Fig. 17 is a sectional detail view, taken on the line Il-l'l of Fig. 14;

Fig. 18 is a front elevational view of the selector switch;

Fig. 19 is a wiring diagram showing the electrical system of the phonograph; and

Fig. 20 is a wiring ldiagram showing the electrical system of the remote control.

Referring to the drawings, the automatic phonograph referred to above and illustrated in Figs. 11, 12 and 13, is substantially similarto and operates in substantially the same way as described in patent application Serial No. 161,906 previously referred to. It is, therefore, not necessary to describe the complete machine, but it is suillcient to emphasize those parts which are modified or added to the machine described in that application.

'I'he phonograph comprises a frame 2l in which are mounted a plurality of sliding frames 22 which are adapted to be slid individually to the right `as viewed in Fig. 11. into alignment with a turntable, not shown. The turntable automatically rises, bringing the record on the individual carrier 22 upwardly into contact with a needle 23 of a pick-up 24 which is carried by the arm 26.

At the end of the playing of a record, means controlled by the tone arm 25 are brought into operation for effecting the record changing cycle which is controlled by the single rotation of a cam shaft 28. During this cycle the turntable descends, the player arm 25 is moved to initial playing position, which is the position in which it is shown in Fig. 11, and the member 21, which is pivotally mounted on an arm 28, snaps of! the abutment II into the position in which it is shown ln Fig. l1, into which position it is biased by a spring 30. In so doing the ratchet 3| of the accumulator switch is moved one tooth in counterclockwise direction, as viewed in Fig. 11, this ratchet being engaged by the pin 32 carried by the member 21.

If this movement of the ratchet wheel ll moves the pin I3 which is mounted on the ratchet wheel into engagement with the switch member il. the contact l5 on that switch member is moved away from the contact 3i and the circuit to the motor Il is broken. If, however, the pin 33 does not make contact with the switch member 3l, the motor Il continues to operate, the record carrier 22 is returned to the stack and a new carrier 22 is moved outwardly into alignment with the turntable and the turntable rises to carry the record into engagement with the needle 23. In this way a series of records may be played until eventually the switch arm 34 is moved away by the pin 33.

'I'he ratchet wheel 3| is biased in the clockwise direction by means of a spring 3l. It is normally held against rotation in this direction by means of an escapement member 38. This escapement member is adapted to be actuated to permit the ratchet wheel 3| to rotate step-bystep in the clockwise direction by means of an against the action of a spring 42. When the electromagnet 40 becomes deenergized, the escapement member 3l returns to its normal position and the net result is that the ratchet wheel moves one tooth in the clockwise direction each time that the electromagnet is energized.

The electromagnet is energized by means of switches I3 which are closed by means of coins descending through coin chutes M. These switches and coin chutes are well known in the art and are illustrated diagrammatically only in Fig. 1l. It will be noted that if a nickel passes downwardly through the coin slot on the righthand side, the ratchet wheel Il will be turned one tooth in the clockwise direction. This initial movement of the ratchet wheel Il permits the spring 45 to move the switch member 34 to switch-closing position, thus starting the motor. It may here be noted that when the switch lever 34 is in open position a contact |10, which is electrically connected to the contact 3l, engages a contact I'II.

The left-hand one of the three coin chutes is provided with five switches and it will be readily understood that this coin chute is intended for quarters. A quarter passing down this coin chute closes ilve switches in succession and the magnet 40 is energized five times in succession, thus moving the ratchet wheel Il five teeth in the clockwise direction. l

The middle coin chute shown in Fig. 11 contains two switches and is intended to receive dimes. each dime moving the ratchet wheel 3| ytwo teeth in the clockwise direction.

It may be stated that if the ratchet wheel 3| lis displaced a certain number of teeth in the clockwise direction by the insertion of a suitable coin or coins into the chutes M, the phonograph will play the corresponding number of selections. the ratchet wheel 3| being returned one tooth in 'the counterclockwise direction after the playing of each selection. Finally, when the last selection is played, the pin I3 engages the switch member Il and swings it into switch-opening position as shown in Fig. 11.

During each record-changing cycle, that is. during` each rotation of the shaft 2l, means (not shown) associated with this shaft, and including a frictional drive, actuate mechanism for predetermining the next record to be played. Last said mechanism is connected to a shaft which is operatively connected by gears l4l and Il to a shaft Il. The shaft is connected by a universal joint Il to a selector shaft Il.

The selector shaft il is provided with a helical series of pins l2. The pins 52 are located equidistantly in the longitudinal direction of the shaft Il and the pins are progressively displaced by angular amounts along the series. The pins 52 correspond in number to the number of records. In the case illustrated, twenty records are employed and the shaft Si is provided with twenty pins 52. The pins 52 are spaced correspending to the selector levers (Fig. 1l) and adjacent pins are displaced 18 degrees one from another in the manner shown in Fig. 13: that is, taking the position of the left-hand pin, as viewed in Fig. 11, as zero, then the second pin is displaced from the zero direction by 18 degrees in the clockwise direction, as viewed in Fig. i3.

The shaft 5I is mounted in bearings which are carried by arms 54 which are rigidly carried by a shaft 55 pivotally mounted on part of the frame of the machine. The selector arms 5l are also pivoted on the frame of the machine and are arranged to project out beyond the front of the machine.

The present arms 53 differ from the corresponding arms of the above identified application in that their outer ends are relatively displaced fanwise, as shown in Figs. 12 and 13. Nevertheless, their operation is essentially the same. Each arm 53 is associated with a particular record and when that arm is depressed the associated record will be played next. Each arm is provided with a downward projection 55 which is normally located out of the path of the associated pin 52 which is in alignment with it, as best seen in Fig. 12. When, however, one of the arms 53 is depressed, for example, the second arm from the left as shown in Fig. 13, its projection 55 is brought into the path of the associated pin 52, that is, the second pin from the left. Each arm 53 is provided with a pin 51 which is adapted to cooperate with a resilient comb-like member 55, as shown in Fig. 13. The result of this cooperation is that the member 55 holds each arm 53 in its upward or downward position.

In the normal operation of the machine, that is, the operation of the machine without the depression of anyvof the arms 53, the selector mechanism (not shown) which predetermines the next record to be played is actuated by the shaft 25 so as to rotate the shaft 5l a complete revolution and an additional 18 degrees. This will bring the selector mechanism (not shown) into position to play the next record in the stack and it will bring each pin 52 successively into the position in which it is directed towards the projec tion 55 of its arm 53. Consequently, the records will be played in succession as long as none f the arms 53 is depressed.4 In the event, however, that one of the arms 53 is depressed, the shaft 5| is not permitted to rotate one revolution and an additional 18 degrees. It is arrested by the engagement of the projection 55 of the depressed arm 53 by the corresponding pin 52.

The selector mechanism (not shown) is likewise arrested, this arrestment being permitted by the frictional drive previously referred to and consequently 'the record corresponding to the depressed arm 53 is played.

After the selected record is moved into playing position, means (not shown) controlled by the shaft 25 oscillate the shaft 55 in the clockwise and counter-clockwise directions as viewed in Fig. 13.

'I'he result is that the particular arm 53, whose projection 56 is in engagement with its pin 52, is displaced upwardly and is thereby returned to normal position. In the event that a plurality of the arms 53 have been pressed downwardly, the others are not interfered with since only one pin 52 is in engagement with one arm 53.

Each of the arms 53 is provided with two downward extensions 55. To one of these extensions of each of the arms 53 is connected an individual link 50. These links extend downwardly and each is connected to the armature of a solenoid 52. These solenoids are mounted, as shown in Figs. 11, 12 and 13, on a plate 53 mounted on the front of the chassis. The manner in which the solenoids 52 are energized will hereinafter be more fully described. `The plate .53 also carries a solenoid 54 which is provided with the armature 55. This armature is connected by links 65 and 51 to an extension 58 carried by a discharge bar 55. r A

The discharge bar 59 is pivotally mounted on a shaft 15 and is biased downwardly by a spring 1 I. The downward movement of the bar 59 is limited tion.

Each of the arms 53 is provided with a rearwardly directed projection 13. The projections 13 of the arms 53 are locked in horizontal alignment and are normally somewhat above the position of the bar 55, as is best seen in Fig. 12. When one or more of the arms 53 is or are depressed, the projection or projections 13 thereof move downwardly into a position adjacent the bar 55. This is best seeny in Pig. 13, where the second arm 53 from`the left as viewed from the front of thel machine is shown in depressed condition. It will readily be understood that when the bar 55 is osclllated by the tion of the solenoid 54, the depressed arms 53 are elevated into their normal position.

'I'he shaft 45 may carry thereon at its forward end 'a sprocket wheel 14 which is connected by means of a sprocket chain 15 to a sprocket wheel 15. The sprocket chain 15 may pass around suit-V able idlers 11 which are carried by a pivoted arm 15. The arm 15 is pulled downwardly by a spring 15 so as to maintain the chain 15 under suitable tension. The sprocket wheel 15 may be rigidly connected to an indicating card 85 which coopcrates with suitable means (not shown) for indicating which record is being played.

From the foregoing description it will readily be understood that when one or more coins is or are inserted by means of any of the coin chutes 44, the machine will be put into operation and 40 thata plurality of records corresponding to the value of the coins inserted will be played in sequence by the phonograph. If a similar number of arms 53 are depressed, then the machine will play the selections corresponding to the arms 53 which are then depressed. This general operation of the machine will be readily understood from the patent application hereinabove referred to.

In addition to this manner of operation, the machine is adapted to be operated by one or more remote control units. the nature of which will now be described.

The remote control unit shown in the drawings and particularly shown in Figs. 1 and 2 oomprises a housing 5|, which housing is provided with a coin slot 52. 'Ihis coin slot delivers the coin into a coin chute 53 through which it passes to a coin box 54 in the bottom of the housing. In passing downwardly through this coin chute the coin closes a switch 55 which energizes an electromagnet 55. 'I'his electromagnet is provided with an amature 51 which is integral with an escapement member 55. This escapement member is pivotally mounted on a shelf 55 which is located within the housing some distance above the bottom thereof.

The escapement member 55 cooperates with a ratchet wheel 55 which is generally similar to the ratchet wheel 3| previously described. This ratchet wheel 55 is biased in the clockwise direction, as viewed in Fig. 5, by means of a spring 5|. It will readily be understood that each time the electromagnet 55 is energized the escapement member 55 is oscillated to and fro, with the result that theratchetwheel moves the distance oi' one toothin'tbe-eloekwlse direction.

rtwmreaduybemdersundthattnecomnct' normal position, the ratchet wheel 90 is in the position shown in Fig. 10.

'I'he ratchet wheel is provided with a pin 92 which is in engagement with one arm of a bell crank lever 93 maintaining this bell crank lever in the position in which it is shown in Fig. 10. The bell crank lever 93 is pivotally mounted by a pivot 94 on a base 95 which is mounted on the shelf 89. The lever 93 and the base 95 may suitably be of insulating material.

'I'he lever 93 carries contacts 96 and 91 which are adapted toengage contacts 98 and 9,9, {respectively, which latter contacts arel mounted on the base 95. The bell crank'lever 93 is biased toward contact engaging position by means of a spring |00, with the result that the contacts 96 and 91 engage the contacts 98 and 99, respectively, except when the lever 93 is moved into its position shown in Fig. l0 by the pin 92. It will readily be understood that when one or more coins are inserted in the coin chute, the ratchet wheel 90 is displaced by the corresponding number of teeth in the clockwise direction. The pin 92 is thereupon moved away from the lever 93 with the result that the spring |00 moves this lever into contact engaging position.

It is convenient here to note that the ratchet wheel 90 is returned step by step to its initial position by means of a pin III. This pin projects downwardly from a block |02 which is pivotally mounted by a screw |03 on a block |04. 'I'he block |04 is rigidly mounted at the lower end of main shaft |05. 'I'he block |02 is held relative to the block |84 in the manner shown in Fig. 10, by means of a spring |00.

When the shaft rotates in the clockwise direction one revolution from its position shown in Fig. 10, the pin |0| engages an anvil member |01 mounted on the shelf 39 below the ratchet Wheel 90. The anvil member |01 is so located that it displaces the block |02 about its pivot in the counter-clockwise direction as the shaft |05 rotates. Ata certain point of this rotation the pin |0| clears the anvil member |01, with the result that the block |02 snaps past the ratchet wheel 90 under the influence of the spring |06, rotating the ratchet wheel 90 the distance of one tooth in the counter-clockwise direction. 'I'he rotation of the shaft |05 may be repeated at intervals in a manner hereinafter described until the last stepwise movement of the ratchet wheel 90 in the clockwise direction brings the pin 92 into engagement with the lever 93 whereby that lever is moved to circuit-breaking position.

The shaft |05 extends upwardly through a motor |08 which is carried by means of a bracket |09 from a, vertical wall |0'within the housing 8|. The motor is operatively connected by reducing gearing, some of which may be mounted on the shaft |05 to a gear rigidly mounted on the shaft. The upper end of the shaft is rotatably supported by means of a strip of insulation g ||2which1xtends forwardly from the wall |I8.

Upon the shaft |05 is rigidly mounted a drum ||3. This drum comprises a cylindrical metal wall ||4 and two end pieces ||5 and Ill, 'Ihe end walls H5 and ||0 may suitably be of insulating material -which have portions which extend part way into the cylindrical wall i4. The drum is assembled together by means of a. nut ||1 which engages a threaded portion of the shaft |05 so as to force the drum against the hub or. the gear Upon the upper end wall ||5 is mounted a metal ring ||l which is engaged by a brush ||9. The ring ||8 is connected by suitable means, for example the strip |20 to the cylindrical wall ||4.

The drum |3 is normally arrested by the opening of a normally closed leaf switch |2| (Figs. 5 and 9) by a projection |22 (Figs. 5 and 9) mounted on the lower end of the cylinder. When the switch |2| is held open by the projection |22 and one of the switches |23 is closed, the motor is put into operation. The projection 22 moves away from the switch |2| so that it clo'ses. Consequently the Aswitch |2| being in shunt or parallel relationfto the switches |23 (Fig. 20), the motor continues to operate after the switch |23 is opened and until the projection |22 again opens the switch |2|. This occurs when the drum ||3 has made one revolution. The switches |23 are mechanically associated with switches |24 so that when one of the switches |23 is closed, the corresponding switch 124 is also closed.

'I'he common side of the switches |24 is connected to the pole 95 and each of the switches 24 is connected to a corresponding brush |25. These brushes are mounted on strips of insulation |29 carried on the rear side of the vertical wall ||0. At their inner free ends the brushes are provided with hook-like projections |21 which are adapted to engage with the longitudinal ribs |23 formed on the exterior of the metal wall |4 of the drum ||3. I

As best shown in Fig. 1, the ribs |20 are of graduated length and consequently the number of ribs which are engaged by any brush during one revolution depends upon the height of the brush. It may here be noted that the rst five ribs |28 are full length so that the topmost brush |25 will make ve contacts each time the drum ||3 is given one rotation. The next brush will make six contacts and each brush in series regarded in the downward direction will make one more contact. the last, or 20th, brush making 24 contacts during each revolution.

Each pair of switches |23 and |24 is controlled by a button |29, there being a button corresponding to each record of the phonograph. The button |29 projects outwardly through the housing. as best seen in Fig. 4, and is mounted on a ilat bar |30. The buttons |29 are mounted in two vertical rows and the bar |30 of each extends into a switch frame |3| of known type.

The bars |30 carry pieces of insulation |32 which in turn carry bridge pieces |33 on opposite sides of the frame |3|. The bridge pieces |33 extend to the exterior of strips of insulation |34. These strips of insulation carry contacts |35. The bridge pieces |33 and the contacts |35 on each side of each bar |30 constitute the mechanically associated switches |23 and |24 previously referred to. Each switch |23 is connected to the motor and is also connected to one side of the secondary |35 of the transformer |31, which supthe .contact 99 and pole 91 with the other side of the motor. The transformer |31 is preferably arranged to supply 24-volt current for the motor. i

Each of the switch frames |3| is provided with 9, locking bar |39 whichis best seen in Fig. 7. vIt will readily be understood that when one of the bars |30 is pushed inwardly, for example the middle bar shown in Fig. 7, the associated detent |40 of the locking bar is cammed out of the opening |4| in the actuated bar |30. When the bar |30 is pushed in suiiiciently, the detent |40 drops into the opening |42 in the actuated bar. The locking. bar |39 is biased downwardly by a spring |43 so that the bar |30 which has been pressed inwardly is locked in its inward position until the locking bar |30 is moved upwardly. When this bar is thus moved upwardly, the bar |30 which has been pushed inwardly, or a plurality of these bars if they have been pushed inwardly, is released andthe bar or bars are moved outwardly by means of springs |44 which are associated therewith.

with forwardly projecting ends |46 which extend through an opening |41 in said wall. The projections |46 are adapted to be engaged by the without the transmission of glare from the lamps projection |22 near the end of its rotation. This projection has an inclined lower surface which is adapted to engage and depress the projections |46.

Immediately after the projection |22 has actuated the locking bars |39 in the manner described, it engages and opens the switch |2 thereby stopping the motor |08 and leaving the remote control unit in condition for the next selection. During thisnal movement of the drum ||3, the block |02 snaps past the ratchet wheel 90 and returns it the distance of one tooth in a counter-clockwise direction as viewed in Fig. 10. If this movement of the ratchet wheel 90 brings the pin 92 into operative contact with the lever 93, the contacts 96 and 91. are moved away from the contacts 98 and 99, respectively. To make a further selection it is necessary to insert one or more coins in order to render the motor circuit capable of being completed by one of the switches |23.

I t may here be noted that if two or more of the buttons |29 are pressed inwardly, then the selection made will correspond tothe largest numbers of the ribs |28 which are engaged by one of the brushes, which is the lowest brush |25.

'I'he housing 8| is provided near its upper end with a window |48 which is adapted to be illuminated by a lamp |49. This lamp is arranged in parallel with the motor |08 and is adapted to serve as a signal that the user should not select until the motor has stopped operating. Within the housing I prefer to employ two lamps |50 which may be illuminated at all times when the machine is ready for use. These lamps are located behind two vertical rows of name plates |5|. These name plates are located adjacent the buttons |29 and are intended to bear the title of the selection corresponding to the button.

'I'he name plates |5| are carried upon`louvers |52 which are best seen in Fig. 2. The rear faces of the louvers |52 are adapted to act as reectors and to carry light from the adjacent lamp |50 to the name plate |5| immediately above it. In this way the name plates are illuminated from the rear into the users eyes.

The transformer |31. the tube |38 and other radio apparatus ofthe oscillator circuit are carried on a plate |52 which depends from the shelf 89. This oscillator circuit will now be described.

The tube |38 may suitably be a 25A7G tube which comprises a pentodeand a diode. The plate of the diode is connected to one of the alternating current power lines |54. The diode cath.. ode is connected through the contacts 96 and 96. one of the switches |24, one of the brushes |25, drum Il: and plate coil |55 to the plate of the pentode. The diode cathode is also connected directly to the screen of the pentode. The plate coil |55 is connected through a high resistance |55 to the grid coil |51. The grid coil is connected through grid leak |58 to the control grid of the pentode elements of tube |38. 'I'he resistor |55 is in parallel with a condenser |59.

The other power line |60 is connected to the pentode cathode of the tube |38 through a condenser and by means of a suitable lter resistor |6| and condenser |62 to the diode cathode: The plate and grid of the pentode of tube |38 are connected through a variable condenser |63. The

. plate coil |55 and the grid coil |51 are inductively coupled in order to provide the feedback of energy to constitute an oscillator circuit. 'Ihe oscillator ,circuit is tuned by the condenser |63A to the desired frequency, which may, for example, be of the order of 300 kilocycles.

The power line |54 is connected through a condenser |64 and inductance |65 to an intermediate point of the grid coil |51. The condenser |64 is sharply tuned so as to permit only oscillations of the same frequency to pass to the power lines. It

will readily be understood that one of the switches |2-4 being cled, the oscillator circuit is completed each time the associated brush |25 engages a rib |28 on vthe drum ||3. Consequently, a corresponding number of impulses of oscillator irequency is fed out into the power lines |54 and |60 each time the drum ||3 revolves.

The oscillator circuit is as follows: Power line |54, condenser |64, inductance |65, grid coil |51, resistor and condenser |56, |59, drum ||3, brush |25. switch |24, contacts 96 and 98, filter |6|, |62, and power line |60. It isto be noted that owing to the high frequency of the impulses which, as indicated may bearound 300 kilocycles, these impulses are damped out by the meter. They are free to pass through the wiring system on the consumer's side of the meter and, consequently, they can be picked up from any outlet on the premises. They are, therefore, fed into the electrical system at the phonograph, which will now be described.

The electrical system of the phonograph is shown in Fig. 19. It comprises a power supply unit |66, a rectiier |61V for the supply of direct current to certain relays, an amplifier |68, the phonograph motor 31 and associated apparatus previously referred to, and cetain relays which will hereinafter be described in detail.

'I'he amplier |68 is adapted to receive the high frequency impulses delivered by the oscillator in the remote unit and to amplify and rectify these impulses. The ilnal result of each impulse is the energization of a gas tube |69 at the output end of the amplier. This gas tube may suitably be a 2A4G tube and its plate is supplied with alternating current. Owing to the alternation of the plate voltage, the gas tube |69 is'rendered inoperative at the termination of each impulse. Consequently, the gas tube is rendered operative for a short time when each impulse is being received. The result is that the relay |12 is energized for a corresponding number of times and the switch |18 is closed for that number of times.

n the first closure of the switch |18 the relay |14 is energized, the winding 0f the relay |14 being in the plate circuit of the rectifier |81. 'Ihe relay |14 is a time delay relay and consequently it remains energized during a series of impulses transmitted from the oscillator in the remote control. When the relay |14 is energized, the switch |15 is closed, the switch |18 is opened and these two switches remain closed and opened during a series of impulses corresponding to a selection. When the switch |15 is closed'. the

relay Ill'is energized, the switch |18 is closed and the switch |18 is opened.

The cathode of the tube |81 is connected to the winding of the relay|14 and to one side 0f the switch |15. The other side of the relay4l|14 is connected to one side of the switch |18. The other side of the switch |15 is connected to the Awinding of the-relay |11. The switch |18 is connected to one side of the switch |18. The other sides of switches |18 and |18 and the winding |11 are connected to power line |88. The two switches |16 and |18 are connected together and the other side of the switch |18 is connected to the 4common line |88 of the solenolds 82.

One side of the switch |18 is connected to one side of the magnet 48. The other side of this magnet is connected to the common sides of the switches |18, |18 and the relay |11. The other side of the switch |18 is connected to a contact |8| which is the fifth of an arcuate series of contacts mounted on a sheet of insulating material |82. The fourth contact |88 is connected to the cancel relay 84 which in turn is connected to the contact |1| previously referred to.

The physical relation of the relays and the contacts carried on the sheet of insulation |82 is shown in Figs. 14 to 18. The relays are carried on a lframe constituted by a channel member |84. Upon this frame is mounted a ratchet wheel |85, the shaft of which extends through the sheet |82. This shaft carries an arm |88 which is adapted to engage the contacts |8i, |88 previously referred to, contact |81 upon which the arm |88 normally rests, two contacts |88 between |81 and |88 and the contacts |88 which correspond in number and relation to records which may be selected and also to the solenoid 62 which correspond thereto. The ratchet wheel |85 is biased in the counterclockwise direction as viewed in Fig. 15, that is, the clockwise as i viewed in Fig. 18 towards initial position by a spring |89". This initial position is defined by two stops |90, one of which is carried by the ratchet wheel, the other being mounted on the channel member |84 (Figs. 14 and 15).

The armature of the relay |12 carries an arm |9| which is adapted to move downwardly against the tension of a spring |92 each time that the relay |12 is energized. The arm ISI is adapted to cooperate with the ratchet |85 so that this ratchet is moved one tooth in the clockwise direction, as viewed in Fig.l 15, during each energization. The relay |12 is associated with the switch |18 as shown in Fig. 11, this switch closing each time the relay |12 is energized. The ratchet wheel |85 is normally free to return to its initial position.

When the relay |14 is energized, an arm |82' carried by its armature moves upwardly and permits the dog |88 to be moved by a relatively weak spring |84 into engagement with the ratchet wheel |85. The dog |88 is provided with an arm |85 which extends below the arm |82'. As has previously been explained, the relay |14 is a delay relay and it remains energized during a series of impulses corresponding to a selection. Consequently, during such a series of impulses, the energization and deenergization of the relay |14 will cause the ratchet wheel |85 to advance a number of teeth corresponding to the selection.

Thus, if record No. 20,is selected, the arm |88 will be moved in stepwise fashion over contacts |88, |8| and |88 until the last contact is engaged. When the series of impulses terminates, therelay |14 is deenergized and the armature spring pulls the amature downwardly, the dog |88 is moved-downwardly so that the arm |88 returns to initial position, that is into engagement with the contact |81. The shaft of the ratchet wheel |88 carries a second resilient arm |88 which engages an arcuate band of metal |81 on the sheet |82. The band |81 is connected to the power line I 54. 'I'he delay relay |14 actuates lthe switches |15 and |18. The former is closed when this relay is energized and the latter is opened.

The frame |84 carries the relay |11. This relay actuates the switches |18 and |18, closing the former and opening the latter when the relay is energized.

The operation of the device will be readily understood from the previous description. For con venience, a brief rsum of the manner of operation of the machine will now be given. It will be understood that the phonograph itself can be operated in known manner. That is, a patron can depress any number of levers 88, corresponding to selections he desires to play. He may then insert an appropriate number 4oi. coins in the chutes 44 thereby displacing the ratchet .wheel 8| a corresponding number of steps in the clockwise direction, as viewed in Fig.'11. This brings the contact into engagement with the contact 88 and the motor 81 is put into operation.

The operation of the motor results in the playing of one of the selected records and when that selection is finished, the cam shaft 28 goes into operation again, effecting the replacement of the played record in the stack and the moving out of the next selected record for playing. During this revolution of the cam shaft 28, the ratchet wheel 8| is returned one step by the pin 82 in the manner previously described. The phonograph continues to play until the pin 88 is eventually brought into engagement with the lever 84. Of course, if no selections are made, the machine will play a number of records successively, corresponding to the value of the coins inserted.

When selection is made at the remote unit, or one of the remote units, the patron inserts one or more coins or coins of different value in the coin slot of the remote control unit. The result of such insertion is the energization of the magnet 88 and the displacement of the ratchet wheel 88 in the counterclockwise direction, as viewed in Fig. 10. to an extent corresponding to the number or value of coins inserted.

'I'his brings contact 88 into engagement with contact 88, and contact 81 into engagement with contact 88. and this engagement is maintained until the shaft |88 has been rotated in the clockwise direction, as viewed in Fig. 10, for a number of times corresponding to the number of teeth by which the ratchet wheel 88 has been displaced by the insertion of coins. The shaft |88 makes one revolution each a record is selected, and it will thus be seen that whenever the'number of selectionspaid for have been in tact selected, further selection is rendered impossible by movement of the lever 88 by the pin 82.

Selection is made, after the ratchet wheel 90 has been energized by the` insertion of coin or coins. by merely pressing one of the buttons |29 corresponding to the desired selection. This button is locked in the "in position and thus the corresponding' switch |23 and corresponding switch |24 are maintained closed. The closing oi.' the switch |28 starts the motor |08. The motor continues to operate until the shalt has made one revolution, whereupon its operation is terminated by the opening of the switch |2l. The switch |28 opens while the motor |08 is in operation. A

It will thus be seen that the oscillator circuit described above is completed by engagement of the corresponding brush |25 'with they ribs |28 of the ydrum H3. The number o! impulsesy sent out on the lines |54 and'l60 thus corresponds to the position of the brush |25. Thus, selection No. 'i corresponds to eleven impulses. The result is that the gas tube |69 is energized eleven times in regular succession.

It may here be interposed that on the third energization of the relay |12, a cancelling circuit is completed. This only occurs when the ratchet wheel 8| is in the position shown in Fig. 11, that is, in its position immediately before the phonograph is put into operation. The first impulse which energizes the gas tube |69 causes the energization of relay |12. This eiects the closure of the delay relay |14 which remains closed for the series of impulses. 0n each energization of the relay |12, the arm |86 is moved from one contact to the next. When the delay relay |14 is energized, that is during the reception of a series of impulses, the relay |11 is energized, switch |18 is closed and switch |19 is opened.`

During the same time the dog I 93 is maintained in operative relation to the ratchet wheel |85. 'I'he ilrst two impulses move the arm |86 into engagement successively with the two contacts |88. It may here be noted that these dead contacts are provided in order to prevent any possibility of the phonograph being actuated by transient impulses which may pass over the power lines |54 and |60. In order for the arm |86 to reach the contact |83, it is necessary i'or at least three impulses to be applied in timed relation to the physical constants oi the relays. On the third impulse, the arm |86 engages the contact |83 and the following circuit` is completed: power line |60, contact |10, contact '|1|, cancelling solenoid 64, contact |83, arm |86, arm |56, band |91, power line |54.

The cancelling solenoid 54 is thereby energized. This results in the swinging of the cancelling bar 68 which physically moves upwardly any of the selector levers 53, which may have been depressed. It will -be noted that 'this circuit is only completed when the phonograph is being putinto operation. II the phonograph is in operation, the contact |10 is separated from the contact |1|. Consequently it is impossible for a patron at a remote control position to cancel selections made at the machine by a patron who has already put the machine into operation.

To resume a consideration of the eleven impulses 2, 3, 4, which have been originated by the pressing of button |29 corresponding to selection No. 'I as previously mentioned. the fourth impulse brings the arm into engagement with contact |8|. 'I'his engagement has no eilect since the switch |19 is opened. 'I'he next seven impulses4 move the arm |86 seven steps into engagement with the contact |88 which is connected to the solenoid 62 corresponding to record No. 7. 'I'his is the eleventh contact removed from contact |81. In these sidewise movements over the contacts |89 no, current passes through any of the solenoids 62, because the switch 16 is opened. When no further impulses are received. the delay switch |14 is deenergized, the switch |15 opens and the switch |16 closes.

The opening of the switch |15 results in the deenergization of the relay |11, but this occurs a short time after the deenergization of the relay |14. Consequently, for a short time after the deenergization of the relay |14, a circuit is completed through power line |,54,.arm |88, the contact |88 engaged by this arm, the corresponding solenoid 62, line |80, switch |16, switch |18 and power line |60. Consequently, the solenoid 52. corresponding to the selection desired, is energized and the correspondingselector lever 58 is pulled downwardly. wThis circuit is promptly interrupted by the opening of the switch |18 as a result of the deenergization of the relay |11.

'I'his deenergization also results in the withdrawal of the dog |93 from the ratchet wheel |85, and the arm |86 moves back towards initial position. In passing over the contacts |89, no circuit is completed because switch |18 is open. When the returning arm |86 engages the contact |8|, a circuit is completed from the power line |54, arm |86, contact |8I, closed switch |19, magnet 40 and power line |60.

The energization of the magnet 40 results in the movement of the ratchet wheel 3| one tooth in the clockwise direction, as viewed in Fig. 1l. 'I'his puts the phonograph into operation to `play the selected record corresponding tol the depressed lever 53. When the phonograph is in operation and a further selection is made at the remote control unit, the corresponding arm 53 is moved downwardly, and the ratchet wheel 3| is moved another step inthe clockwise direction. 'Ihe only difference is thatno circuit is completed through the solenoid 64, and the pin 33 being out of engagement with the lever 34, this lever is not moved. Thus any desired number of selections within the capacity of the machine may be made from the remoteV unit, or any number of remote units, which may be plugged into the power lines |54 and |60.

It will be noted that in the remote control operation of the machine, the insertion of coins in the remote control displaces the ratchet Wheel 90 by a certain number of teeth. The selection of each record at the remote control discharges the ratchet wheel 90 one tooth and dispiaces the ratchet wheel 3| one tooth in the opposite direction. That is, credit is established at the remote control unit on the ratchet wheel 90 by the insertion of a number o1' coins, and this credit is transferred step by step to the ratchet wheel 3| each time a selection is made. The credit established on the ratchet wheel 3| at the phonograph is discharged step by step by the operation of the cam shaft 26 after each record is played.

Although the present invention has been described in connection with the speciilc details of a preferred embodiment thereof, it must be understood that such details are not intended to be 

